A New 5 H -Purin-6-amine from the Leaves of Sedum Sarmentosum

Phytochemical constituents were isolated from Sedum sarmentosum leaves using open column chromatography and medium-pressure liquid chromatography. Their structures were identified as 2,4-pyrimidinedione ( 1 ), N -methylhydroxylamine ( 2 ), 5 H -purin-6-amine ( 3 ), uridine ( 4 ), l -tyrosine ( 5 ), and l -prolyl- l -tyrosine ( 6 ) using mass spectrometry and 1 H- and 13 C-nuclear magnetic resonance spectroscopic analysis. Among them, compound 3 (5 H -purin-6-amine) was isolated for the first time from a natural source.